You can teach your child to identify the noun phrase that takes the form of Verb Noun Verb and in this case, it is “saw(verb) Mrs Doral (noun) _____(verb). The first action “saw” is in the past as the sentence time expression is “just now”. For the second verb after the noun, there is no need to express the past tense as it is a descriptive state that tells us what Mrs Doral saw. The second verb will always be in the Root form of the word and in this case, “donate”. You may refer to https://youtu.be/XK74pMdw0no to understand what Root words are.
To connect with The Learning Anchors, the website link is http://www.thelearninganchors.com/p/about-learning-anchors.html?m=1